These magnetic jewelry clasps are made of high grade NdFeB material, can be coated with black Epoxy, Ni, gold, silver, Zn, and more. They are used for necklace, bracelet and other link style ornament, and stick together themselves to fit both end of link style ornament. It is convenient to wear compared with typical clasps. Therapy function: magnetic clasp and magnetic jewelry can increase the vibrant ion in the blood to promote blood circulation. It is good for prevention of hypertension and cardiovascular and cerebrovascular diseases. Customized specifications are welcomed. For more detail info, please feel free to visit our website or inquire us at any of your convenience. Website: